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  3. Fear can be an effective way to change behavior. One study compared the effects of high-fear and low-fear appeals on changes in

Fear can be an effective way to change behavior. One study compared the effects of high-fear and low-fear appeals on changes in

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问题    Fear can be an effective way to change behavior. One study compared the effects of high-fear and low-fear appeals on changes in attitudes and behaviors related to dental hygiene(卫生). One group of subjects was shown awful pictures of【C1】______teeth and diseased gums; another group was shown less frightening materials such as plastic teeth, charts, and graphs. Subjects who saw the frightening materials reported more anxiety and a greater【C2】______to change the way they took care of their teeth than the low-fear group did.
   But were these reactions actually【C3】______into better dental hygiene practices? To answer this important question, subjects were called back to the laboratory on two【C4】______ (five days and six weeks after the experiment). They chewed disclosing wafers(牙疾诊断片)that give a red stain to any uncleaned areas of the teeth and thus provided a direct【C5】______of how well they were really taking care of their teeth. The result showed that the high-fear appeal did actually result in greater and more【C6】______changes in dental hygiene. That is, the subjects【C7】______to high-fear warnings brushed their teeth more【C8】______than did those who saw low-fear warnings.
   However, to be an effective persuasive device it is very important that the message not be too frightening and that people be given【C9】______guidelines to help them to reduce the cause of the fear. If this isn’t done, they may reduce their anxiety by denying the message or the【C10】______of the communicator. If that happens, it is unlikely that either attitude or behavior change will occur.
A)accustomed I)eligible
B)carefully J)exposed
C)cautiously K)indication
D)concrete L)occasions
E)credibility M)permanent
F)decayed N)sensitivity
G)desire O)translated
H)dimensions
【C6】
选项
答案D
解析 该空格前面有并列连词and，以及形容词比较级more，因此推断空格处应该填入一个形容词。下文提到了讲究口腔卫生的一个具体事例——刷牙，所以确定答案为D)concrete“具体的，明确的”。备选形容词里还有eligible和permanent，eligible意为“适当的，合适的”，不符合句意，可以排除；permanent“永久的，永恒的”没有比较级的用法，可以排除。
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